From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v1] rockchip: rk3399: spl: make SPL boot-order configurable via /chosen
Date: Tue, 4 Apr 2017 19:05:32 -0600 [thread overview]
Message-ID: <CAPnjgZ3S1+U-sKXBeuo6UFa=dWUc7otFg4dw_ih0Qb5Yv0VfKA@mail.gmail.com> (raw)
In-Reply-To: <CAPnjgZ3Aqu53xEH3Bja==brQ0XMo9A0attjc+FF1-Br+OaJgkg@mail.gmail.com>
On 31 March 2017 at 22:23, Simon Glass <sjg@chromium.org> wrote:
> On 28 March 2017 at 03:03, Philipp Tomsich
> <philipp.tomsich@theobroma-systems.com> wrote:
>> The RK3399 does not have any boot selection pins and the BootROM probes
>> the boot interfaces using the following boot-order:
>> 1. SPI
>> 2. eMMC (sdhci in DTS)
>> 3. SD card (sdmmc in DTS)
>> 4. USB loader
>> For ease of deployment, the SPL stage should mirror the boot order of
>> the ROM and use the same probing order (assuming that valid images can
>> be detected by SPL) unless instructed otherwise. The boot-order can
>> then be configured via the 'u-boot,spl-boot-order' property in the
>> chosen-node of the DTS.
>>
>> While this approach is easily extensible to other boards, it is only
>> implemented for the RK3399 for now, as the large SRAM on the RK3399
>> makes this easy to fit the needed infrastructure into SPL and our
>> production setup already runs with DM, OF_CONTROL and BLK in SPL.
>>
>> The new boot-order property is expected to be used in conjunction with
>> FIT images (and all legacy image formats disabled via Kconfig).
>>
>> A boot-sequence with probing and fallthroughs from SPI via eMMC to SD
>> card (i.e. &spiflash, &sdhci, &sdmmc) has been validated on the RK3399-Q7.
>>
>> Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
>> Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
>> Tested-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
>> ---
>>
>> arch/arm/mach-rockchip/rk3399-board-spl.c | 99 +++++++++++++++++++++++++++++++
>> doc/device-tree-bindings/chosen.txt | 22 +++++++
>> 2 files changed, 121 insertions(+)
>
> Acked-by: Simon Glass <sjg@chromium.org>
Applied to u-boot-rockchip, thanks!
prev parent reply other threads:[~2017-04-05 1:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 9:02 [U-Boot] [PATCH v1 0/1] rockchip: rk3399: spl: make SPL boot-order configurable via /chosen Philipp Tomsich
2017-03-28 9:03 ` [U-Boot] [PATCH v1] " Philipp Tomsich
2017-04-01 4:23 ` Simon Glass
2017-04-05 1:05 ` Simon Glass [this message]
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